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   <div id="projectname">Tekdaqc Firmware
   &#160;<span id="projectnumber">1.0.2.0</span>
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   <div id="projectbrief">The firmware of the Tekdaqc.</div>
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<div class="header">
  <div class="headertitle">
<div class="title">syscalls.c</div>  </div>
</div><!--header-->
<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="preprocessor">#ifdef DEBUG</span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="preprocessor"></span><span class="comment">/* Includes */</span></div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="preprocessor">#include &lt;stdint.h&gt;</span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="preprocessor">#include &lt;sys/stat.h&gt;</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="preprocessor">#include &lt;stdlib.h&gt;</span></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="preprocessor">#include &lt;errno.h&gt;</span></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="preprocessor">#include &lt;stdio.h&gt;</span></div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="preprocessor">#include &lt;signal.h&gt;</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="preprocessor">#include &lt;time.h&gt;</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="preprocessor">#include &lt;sys/time.h&gt;</span></div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="preprocessor">#include &lt;sys/times.h&gt;</span></div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="_tekdaqc___debug_8h.html">Tekdaqc_Debug.h</a>&quot;</span></div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="_tekdaqc___b_s_p_8h.html">Tekdaqc_BSP.h</a>&quot;</span></div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="comment">/* Variables */</span></div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="preprocessor">#undef errno</span></div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="preprocessor"></span><span class="keyword">extern</span> int32_t errno;</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;<span class="keyword">register</span> uint8_t * stack_ptr <span class="keyword">asm</span>(<span class="stringliteral">&quot;sp&quot;</span>);</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;uint8_t *__env[1] = { 0 };</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;uint8_t **environ = __env;</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="comment">/* Functions */</span></div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;<span class="keywordtype">void</span> initialise_monitor_handles() {</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;}</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;<span class="keywordtype">int</span> _getpid(<span class="keywordtype">void</span>) {</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;    <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;}</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;<span class="keywordtype">int</span> _kill(int32_t pid, int32_t sig) {</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;    errno = EINVAL;</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;    <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;}</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;<span class="keywordtype">void</span> _exit(int32_t status) {</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;    _kill(status, -1);</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;    <span class="keywordflow">while</span> (1) {</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;    } <span class="comment">/* Make sure we hang here */</span></div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;}</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;<span class="keywordtype">int</span> _write(int32_t file, uint8_t *ptr, int32_t len) {</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;<span class="preprocessor">#if defined(SERIAL_DEBUG)</span></div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;<span class="preprocessor"></span>    int32_t i = 0;</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;    <span class="keywordflow">for</span> (i = 0; i &lt; len; ++i) {</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;        <span class="comment">/* Write a character to the USART */</span></div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;        USART_SendData(<a class="code" href="group__com__port__driver.html#ga5907fc16d2de43c1f80f0de8b68a577a">COM2_USART</a>, ptr[i]);</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;        <span class="comment">/* Loop until the end of transmission */</span></div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;        <span class="keywordflow">while</span> (USART_GetFlagStatus(<a class="code" href="group__com__port__driver.html#ga5907fc16d2de43c1f80f0de8b68a577a">COM2_USART</a>, USART_FLAG_TC) == RESET) {</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;        }</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;    }</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;<span class="preprocessor">#elif defined(SWV_DEBUG)</span></div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;<span class="preprocessor"></span>    <span class="keywordtype">int</span> i=0;</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;    <span class="keywordflow">for</span>(i=0 ; i&lt;len ; i++) {</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;        ITM_SendChar((*ptr++));</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;    }</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;<span class="preprocessor"></span>    <span class="keywordflow">return</span> len;</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;}</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;caddr_t _sbrk(int32_t incr) {</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;    <span class="keyword">extern</span> uint8_t end <span class="keyword">asm</span>(<span class="stringliteral">&quot;end&quot;</span>);</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;    <span class="keyword">static</span> uint8_t *heap_end;</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;    uint8_t *prev_heap_end;</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;    <span class="keywordflow">if</span> (heap_end == 0)</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;        heap_end = &amp;end;</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;    prev_heap_end = heap_end;</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;    <span class="keywordflow">if</span> (heap_end + incr &gt; stack_ptr) {</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;        <span class="comment">//      write(1, &quot;Heap and stack collision\n&quot;, 25);</span></div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;        <span class="comment">//      abort();</span></div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;        errno = ENOMEM;</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;        <span class="keywordflow">return</span> (caddr_t) -1;</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;    }</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;    heap_end += incr;</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;    <span class="keywordflow">return</span> (caddr_t) prev_heap_end;</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;}</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;<span class="keywordtype">int</span> _close(int32_t file) {</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;    <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;}</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;<span class="keywordtype">int</span> _fstat(int32_t file, <span class="keyword">struct</span> stat *st) {</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;    st-&gt;st_mode = S_IFCHR;</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;    <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;}</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;<span class="keywordtype">int</span> _isatty(int32_t file) {</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;    <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;}</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;<span class="keywordtype">int</span> _lseek(int32_t file, int32_t ptr, int32_t dir) {</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;    <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;}</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;</div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;<span class="keywordtype">int</span> _read(int32_t file, uint8_t *ptr, int32_t len) {</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;    <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;}</div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;<span class="keywordtype">int</span> _open(<span class="keyword">const</span> uint8_t *path, int32_t flags, int32_t mode) {</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;    <span class="comment">/* Pretend like we always fail */</span></div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;    <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;}</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;<span class="keywordtype">int</span> _wait(int32_t *status) {</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;    errno = ECHILD;</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;    <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;}</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;</div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;<span class="keywordtype">int</span> _unlink(<span class="keyword">const</span> uint8_t *name) {</div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;    errno = ENOENT;</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;    <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;}</div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;<span class="keywordtype">int</span> _times(<span class="keyword">struct</span> tms *buf) {</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;    <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;}</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;<span class="keywordtype">int</span> _stat(<span class="keyword">const</span> uint8_t *file, <span class="keyword">struct</span> stat *st) {</div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;    st-&gt;st_mode = S_IFCHR;</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;    <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;}</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;</div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;<span class="keywordtype">int</span> _link(<span class="keyword">const</span> uint8_t *old, <span class="keyword">const</span> uint8_t *<span class="keyword">new</span>) {</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;    errno = EMLINK;</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;    <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;}</div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;<span class="keywordtype">int</span> _fork(<span class="keywordtype">void</span>) {</div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;    errno = EAGAIN;</div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;    <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;}</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;<span class="keywordtype">int</span> _execve(<span class="keyword">const</span> uint8_t *name, uint8_t * <span class="keyword">const</span> *argv, uint8_t * <span class="keyword">const</span> *env) {</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;    errno = ENOMEM;</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;    <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;}</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;<span class="preprocessor">#endif </span><span class="comment">/* DEBUG */</span><span class="preprocessor"></span></div>
<div class="ttc" id="_tekdaqc___b_s_p_8h_html"><div class="ttname"><a href="_tekdaqc___b_s_p_8h.html">Tekdaqc_BSP.h</a></div><div class="ttdoc">Header file for the Tekdaqc. </div></div>
<div class="ttc" id="_tekdaqc___debug_8h_html"><div class="ttname"><a href="_tekdaqc___debug_8h.html">Tekdaqc_Debug.h</a></div><div class="ttdoc">Header file to define precompiler variables for debugging sections of code. </div></div>
<div class="ttc" id="group__com__port__driver_html_ga5907fc16d2de43c1f80f0de8b68a577a"><div class="ttname"><a href="group__com__port__driver.html#ga5907fc16d2de43c1f80f0de8b68a577a">COM2_USART</a></div><div class="ttdeci">#define COM2_USART</div><div class="ttdoc">Definition for COM port 2, connected to USART3. </div><div class="ttdef"><b>Definition:</b> <a href="_tekdaqc___b_s_p_8h_source.html#l00688">Tekdaqc_BSP.h:688</a></div></div>
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